Abstract We have undertaken a molecular analysis of the Orthurethra, one major groups stylommatophoran land snails and slugs. Approximately 4000 nucleotides rRNA gene cluster [5.8S, internal transcribed spacer 2 (ITS2) almost full-length large subunit (LSU; 28S) gene] were sequenced for 40 orthurethran genera belonging to 19 families. Our phylogeny recovers three well-supported clades within Or...

I. Types of Molecular Data: Certainly the lion’s share of molecular data used in phylogeny estimation in is DNA sequence data, but we should examine other types of molecular data, and some of the characteristics of those data that influence phylogeny estimation. A. Inherently Distance-based Data As I indicated last week, there are molecular phylogenetic approaches in which the nature of the dat...